This can happen in some models after installing the Pro Pack. There are several threads in this forum about this effect. It happens in models that in the CR2 there is an un-defined "g" statement. There are two methods that have been tried. The first, suggested by Curious Labs, is to do a clean install od POSER4 without the 4.03 update and then add PPP. The second Method is Giving your models the "Blahs". This method is more time consuming and requires you to use a CR2 editor or a text editor to search out all "g" statements and the one that just have a "g" you would then manually add "blah" to it. the "g" statement is a sub-set of the goemetry, although not a part of the OBJ the cr2 references, more like the custome changes a user can add like a Morph target. example- g hip f 11/1 50/25 55/2 9/3 f 59/82 105/12 100/51 61/79 is how the "g" statement could be defined for a part of the model ( this would be a "correctly" defined "g" g f 11/1 50/25 55/2 9/3 f 59/82 105/12 100/51 61/79 is a un-defined "g" statement, and would and can cause holes in this area of the model. Using a text editor, or a CR2 editor (available in freestuff) you would do a search and replace, for EVERY undefined "g" with "g blah" g blah f 11/1 50/25 55/2 9/3 f 59/82 105/12 100/51 61/79 then you would save the model (under a different name ) and then open poser and try again. This is the method I used and the "blah'ed" model then worked with a problem and no longer had holes. CL is aware of this and I imagine they are doing something but i wold not know what that is.